Air cleaner for carburetors



Apt- 110, 192s.

1,665,434 A. c. BENNETT AIR CLEANER FOR CARBURETORS Filed June 17, 1925C Bennett M WW I n ven for:

Patented Apr. 10, 19 28.

UNITED STATES PATENT OFFICE.

AIR CLEANER FOR CARBURETORS.

Application filed June 17, 1925.

My invention relates to air cleaners for carburetors, particularly tosuch air cleaners as may be applied to the carburetor of a gas engine ofmotor vehicles, as, automobiles or tractors.

It is an object of my invention to provide an air cleaner of exceedinglysimple construction which will be cheap to make, easy to instal, easilytaken care of and which will have a high degree of efiiciency.

The principal object of my invention is to provide an air cleaner havinga cylindrical casing adapted to be mounted with the cylinder horizontalproviding a tangential air inlet adapted to cause the air to moverapidly around the inner wall of the casing, and providing an air outletentering the side of said cylindrical casing at a point removed from thecenter of said casing whereby the air circulating chamber is eccentricwith reference to the air exit.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and the novel featuresof the invention are more fully and particularly pointed out in theannexed claims.

In the drawings illustrating an application of my invention in one form,

Fig. 1 is a side elevation view of my air cleaner in operative position.Fig. 2 is a central sectional elevation view of the cleaner in the. sameposition as in Fig. 1, or on line 22 of Fig. 3. Fig. 3 is a sectionalelevation at right angles to the-view shown in Fig. 2 or on the line 3-3of Fig. 2.

My cleaner comprises a casing formed of a cylindrical member 10 andfront and rear walls 11, 12 which provides a closed chamber exceptingfor the opening hereinafter referred to. An air inlet pipe 13extends'tangentially from the casing member, as clearly shown in Figs. 1and 2. A cylindrical portion of the casing member is provided with aninturned lip 14 inside and adjacent theinlet pipe 13 which projects to apoint near the top of the cylindrical casing member so as to leave aninlet opening 15 into the same.

The cylindrical casing member 10 is provided with an overlap indicatedat 16 of Figs. 2 and 3 which overlap provides a tangential' slit-likeopening 17 into a cup extension 18 secured to the lower central ortionof the cylinder member 10 and provided with threads 19 into'which aglass jar or other receptacle 20, having a threaded neck for example,

Serial No. 37,766.

21, is screwed so as to form an airtight junction with said extension18.

An outlet pipe 22 extends through a flanged opening 23 in the front 11of the cleaner at a point outside of the center of the cylinder 10,preferably along the vertical axis thereof, and so positioned as to comejust below the lower limit of the air inlet opening 15. The pipe 22 iscut away'for half its circumference, as clearly shown at 24' in Figs. 2and 3, the half opening being preferably turned so that its diametricalchord is somewhat angularly disposed in reference to the verticaldiameter of the cylinder as clearly shown in Fig. 2.

In operation the pipe 22 is connected with the inlet pipe of acarburetor. The suction induced by the operation of the gas enginecauses air to enter the cylindrical which air is greatly speeded upbecause of casing 10,

the restricted inlet opening at 15 and is caused to move along the innerwall of the cylinder 10. air are thrown against said wall by thecombined action of the upward deflection of the lip 14, the centrifugalaction of the whirling Particles of dirt carried in the current of airand the action of gravity as I the particles near the opening 17. Theseparticles pass through the opening into the dead air space 25 within thereceptacle 20, where the dust settles and is separated from the air,which passes upwardly to the pipe 22 and enters it through the opening24 and passes through it to the carburetor.

The outlet pipe 22,

positioned as herein described, has three advantages of great importancein effecting dust separation. First, the upper portion 26 of the half ofsaid pipe in the cylindrical casing comprises a deflector and a guidemember for the incoming air passing above it. Second, because of therelatively large distance between the lower edge of said pipe asindicated at 27 and the lower part of the cylindrical casing 10, the airis carried around to the opening 24 in a relatively broad sweep andenters freely the half cylinder behind 24, so that the net ef feet is togreatly reduce the restricting ac tion which takes place when the outletpipe is at the center of the cylindrical casing, wherein the air iscaused to make much shorter turns, with the result of requiring morepower to move the same volume of air through at the same speed. Third,because of the wide movement of the air along the effective cleaningportion of the inside of lot the cylinder, indicated at 28, the relativespeed of the air at this critical point in the cleaner is greatlyincreased thereby, increasing the centrifugal action, which tends tothrow the particles of dirt against the inner cylindrical wall and hencethrough the opening 17 into the settling dead air chamber 25. Statedanother way, if there were merely a central outlet opening by which theair was drawn from the cylinder casing 10 and through the inlet pipe 13,there would immediately be a twisting pull upon that air tending to drawit away from the wall of the cylinder and toward the central outletopening. With the construction herein shown the air moving along theinner wall of the cylinder 10 is not affected by the pull toward thedischarge opening until it is substantially past the dust dischargeopening 17, thus permittingathe incoming stream of air to move in acomparatively thin film along the inner casing wall to and past the dustdischarge 17 after which it is pulled in from the casing wall to theopening 24 and the discharge pipe 22.

I claim:

1. An air cleaner comprising a cylindrical casing member adapted to bepositioned with its axis horizontal and having its ends closed, an airinlet arranged tangentially with relation to the'cylinder wall, adustdischarge passage at the lower portion of the cylinder -wall, and anair outlet pipe extending through one of the end walls of the cylinder,said outlet pipe extending across the cylinder and having a portion ofits wall removed toward the side of the cylindrical casing through whichsaid air inlet passes.

2. An air cleaner comprising a cylindrical casing member adaptedto bepositioned with its axis horizontal and having its ends closed, an airinlet 0 ening arranged tangentially at the top 0 the cylinder, a dustischarge opening at the bottom of the cylindrical wall, and an airoutlet pipe extending through an end of the wall of the cylinder outsideof the center of said cylinder, said outlet pipe extending across thecylinder and being cut away along one wall.

with and at the 3. An air cleaner comprising a cylindrical casing memberadapted to be positioned with its axis horizontal. and having its endsclosed, an air inlet-opening arranged tangentially at the top of thecylinder, a dust discharge opening at the bottom of the cylindricalwall, and an air outlet pipe extending through an end wall of thecylinder outside of the center of said cylinder, said outlet pipeextending across the cylinder and being cut away along the wall towardthe side of the cylindrical casing through which the inlet openingextends.

4;. An air cleaner comprising a cylinder casing member adapted to bepositioned with its axis horizontal and having its ends closed, an airinlet pipe united tangentially top of said cylinder, a lip comprising aportion of the cylinder wall blocking part of said inlet pipe and forming therewith a tangential opening at the top 0 the cylinder, a dustdischarge opening at the ottom of the cylinder, and an air outlet pipeextending through an end wall of the cylinder at a point on the verticalaxis and above the center of said cylinder.

5. An air cleaner comprising a cylinder casing member ada ted to bepositioned with its axis horizonta and having its ends closed, an airinlet pipe united tangentially with and at the top of'said cylinder, alip comprising a portion of the cylinder wall blocking part of saidinlet pipe and forming therewlth a tangential opening at the to at thebottom of. the cylinder, and an air outlet pipe extending through an endwall of the cylinder at a point on the vertical axis and above thecenter of said cylinder, said outlet pipe extending across the chamberformed by the cylinder and its end walls and being half cutaway withinthe cylinder along a diametrical line tipped angularly from the axis ofthe cylinder towards said inlet opening.

In testimony whereof Ihereunto afiix my signature.

' ASHLEY o. BENNETT.

of the cylinder, a dustdischarge opening

